| Assigner | Linux |
| Reserved | 2024-02-19 |
| Published | 2024-04-03 |
| Updated | 2024-06-04 |
Description
In the Linux kernel, the following vulnerability has been resolved: fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats lock_task_sighand() can trigger a hard lockup. If NR_CPUS threads call do_task_stat() at the same time and the process has NR_THREADS, it will spin with irqs disabled O(NR_CPUS * NR_THREADS) time. Change do_task_stat() to use sig->stats_lock to gather the statistics outside of ->siglock protected section, in the likely case this code will run lockless.
Product status
1da177e4c3f4 before cf4b8c39b9a0
1da177e4c3f4 before 27978243f165
1da177e4c3f4 before 7601df8031fd
6.1.82
6.7.6
6.8
References
https://git.kernel.org/stable/c/cf4b8c39b9a0bd81c47afc7ef62914a62dd5ec4d
https://git.kernel.org/stable/c/27978243f165b44e342f28f449b91327944ea071
https://git.kernel.org/stable/c/7601df8031fd67310af891897ef6cc0df4209305
